Update maintainers file

Since there is no x86-64 architecture anymore it cannot be maintained.
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

MAINTAINERS

@@ -1776,8 +1776,8 @@ M:	venkatesh.pallipadi@intel.com
 S:	Maintained
 
 HPET:	x86_64
-P:	Andi Kleen and Vojtech Pavlik
-M:	andi@firstfloor.org and vojtech@suse.cz
+P:	Vojtech Pavlik
+M:	vojtech@suse.cz
 S:	Maintained
 
 HPET:	ACPI hpet.c
@@ -4265,14 +4265,6 @@ P:	Ingo Molnar
 M:	mingo@redhat.com
 S:	Maintained
 
-X86-64 port
-P:	Andi Kleen
-M:	ak@suse.de
-L:	discuss@x86-64.org
-W:	http://www.x86-64.org
-T:	quilt ftp://ftp.firstfloor.org/pub/ak/x86_64/quilt-current
-S:	Maintained
-
 YAM DRIVER FOR AX.25
 P:	Jean-Paul Roubelat
 M:	jpr@f6fbb.org